Me too. Please indulge us. I had no idea that there were two different types of Mk8z ammo. I presumed the one & only type was that produced with the BT bullet for use in the Vickers. It would seem, if I have it correctly, that there is also Canadianicon Mk8z, as per the subject of this thread, of recent manufacture, which is somehow different. Is this so, & how is it different to 'old 8z'?